ZAISS will not upgrade

Currently have ZA Internet Security Suite v8.0.298.035 on a Windows XP Home PC, but I understand v8.0.400.020 is available from this forum. When I open ZAISS, click on Overview on left side of page, then Preferences, then click the Check for Updates button, it says my System is Up to Date. Please advise.

Actually I just used Live Chat today with Tech Support, I had the same problem with ZAISS not updating automatically from the April 2009 release v8.0.298.035 to the newest version released in June 2009, v8.0.400.020.

The Tech Support person told me in our chat session that the number of feature updates in the newest v8.0.400.020 version was deemed not sufficient to force auto-update download of the newest version if you already had v8.0.298.035 installed, but that we can of course download the newest version directly if we want it. Hope that clears this up, ZAISS not auto-updating from v8.0.298.035 to the newest version released in June 2009, v8.0.400.020 apparently has nothing to do with overloaded servers.